package com.atguigu.ssyx.common.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.lang.reflect.Method;
import java.time.Duration;

/**
 * Redis配置类
 */
@Configuration
@EnableCaching
public class RedisConfig {

    // 使用默认标签做缓存
    @Bean
    public KeyGenerator wiselyKeyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }

    // 声明模板
    /*
    ref = 表示引用
    value = 具体的值
    <bean class="org.springframework.data.redis.core.RedisTemplate" >
        <property name="defaultSerializer" ref = "">
    </bean>
     */
    //  工具类：
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        // 创建RedisTemplate对象
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        // 设置Redis连接工厂
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 创建Jackson2JsonRedisSerializer对象
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        // 创建ObjectMapper对象
        ObjectMapper objectMapper = new ObjectMapper();
        // 设置ObjectMapper的属性
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        // 设置Jackson2JsonRedisSerializer的ObjectMapper
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        //  将Redis 中 string ，hash 数据类型，自动序列化！
        // 设置RedisTemplate的key序列化器
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        // 设置RedisTemplate的value序列化器
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // 设置RedisTemplate的hashKey序列化器
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        // 设置RedisTemplate的hashValue序列化器
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        // 初始化RedisTemplate
        redisTemplate.afterPropertiesSet();
        // 返回RedisTemplate
        return redisTemplate;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        // 创建StringRedisSerializer对象
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        // 创建Jackson2JsonRedisSerializer对象
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        //解决查询缓存转换异常的问题
        ObjectMapper om = new ObjectMapper();
        // 设置所有属性可见
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 启用默认类型
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        // 设置ObjectMapper对象
        jackson2JsonRedisSerializer.setObjectMapper(om);

        // 配置序列化（解决乱码的问题）,过期时间600秒
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                // 设置缓存过期时间
                .entryTtl(Duration.ofDays(365))
                // 设置key的序列化方式
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                // 设置value的序列化方式
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                // 禁用缓存空值
                .disableCachingNullValues();

        // 创建RedisCacheManager对象
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                // 设置默认缓存配置
                .cacheDefaults(config)
                // 构建缓存管理器
                .build();
        return cacheManager;
    }
}